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Update A-机器学习实践.md (#47)
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A-机器学习/A-机器学习实践.md

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- 满足最小支持度和最小置信度的规则,叫做“强关联规则”
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> 最小支持度和最小置信度是人工设置的阈值
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- `Lift(X→Y) > 1` 的 X→Y 是有效的强关联规则
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- `Lift(X→Y) <=1` 的 X→Y 是有效的强关联规则
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- `Lift(X→Y) <=1` 的 X→Y 是无效的强关联规则
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- 特别地,`Lift(X→Y) = 1` 时,X 与 Y 相互独立。
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**判断规则的有效性**

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